# MERGHERS pilot: MeerKAT discovery of diffuse emission in nine massive Sunyaev–Zel’dovich-selected galaxy clusters from ACT

@article{Knowles2021MERGHERSPM,
title={MERGHERS pilot: MeerKAT discovery of diffuse emission in nine massive Sunyaev–Zel’dovich-selected galaxy clusters from ACT},
author={Kenda Knowles and D. S. Pillay and Stefania Amodeo and Andrew J. Baker and Kaustuv Basu and Devin Crichton and F. de Gasperin and Mark J. Devlin and Chiara Ferrari and Matt Hilton and Kevin M. Huffenberger and John P. Hughes and Brian J. Koopman and Kavilan Moodley and Tony Mroczkowski and Sigurd Naess and F Nati and Laura Newburgh and Nadeem Oozeer and Lyman A. Page and Bruce Partridge and Christoph Pfrommer and Maria Salatino and Alessandro Schillaci and Crist'obal Sif'on and Oleg M. Smirnov and Sinenhlanhla P. Sikhosana and Edward J. Wollack and Z. Xu},
journal={Monthly Notices of the Royal Astronomical Society},
year={2021},
volume={504},
pages={1749-1758}
}
• Published 30 December 2020
• Physics
• Monthly Notices of the Royal Astronomical Society
The MeerKAT Exploration of Relics, Giant Halos, and Extragalactic Radio Sources (MERGHERS) survey is a planned project to study a large statistical sample of galaxy clusters with the MeerKAT observatory. Here we present the results of a 16-h pilot project, observed in response to the 2019 MeerKAT Shared Risk proposal call, to test the feasibility of using MeerKAT for a large cluster study using short (0.2–2.1 h) integration times. The pilot focuses on 1.28-GHz observations of 13 massive, low…
2 Citations

## Figures and Tables from this paper

A Multiwavelength Dynamical State Analysis of ACT-CL J0019.6+0336
• Physics
Galaxies
• 2021
In our study, we show a multiwavelength view of ACT-CL J0019.6+0336 (which hosts a radio halo), to investigate the cluster dynamics, morphology, and ICM. We use a combination of XMM-Newton images,
A GMRT Narrowband vs. Wideband Analysis of the ACT−CL J0034.4+0225 Field Selected from the ACTPol Cluster Sample
• Physics
Galaxies
• 2021
Low frequency radio observations of galaxy clusters are a useful probe of the non-thermal intracluster medium (ICM), through observations of diffuse radio emission such as radio halos and relics.

## References

SHOWING 1-10 OF 66 REFERENCES
Astrophysics Source Code Library, record ascl:2009.003
• J. Low Temp. Phys.,
• 2016
LOFAR detection of a low-power radio halo in the galaxy cluster Abell 990
• Physics
• 2020
Radio halos are extended ($\sim{\rm Mpc}$), steep-spectrum sources found in the central region of dynamically disturbed clusters of galaxies. Only a handful of radio halos have been reported to
Fast magnetic field amplification in distant galaxy clusters
• Physics
• 2020
In the present-day Universe, magnetic fields pervade galaxy clusters 1 and have strengths of a few microgauss, as measured from Faraday rotation 2 . Evidence for cluster magnetic fields is also
The Atacama Cosmology Telescope: A Catalog of >4000 Sunyaev–Zel’dovich Galaxy Clusters
• Physics
The Astrophysical Journal Supplement Series
• 2021
We present a catalog of 4195 optically confirmed Sunyaev–Zel’dovich (SZ) selected galaxy clusters detected with signal-to-noise ratio >4 in 13,211 deg2 of sky surveyed by the Atacama Cosmology
The Atacama Cosmology Telescope: arcminute-resolution maps of 18 000 square degrees of the microwave sky from ACT 2008–2018 data combined with Planck
• Physics
• 2020
This paper presents an algorithm for generating temperature and polarization maps that have the best features of both Planck and ACT: Planck's nearly white noise on intermediate and large angular
Array programming with NumPy
• Physics
Nat.
• 2020
How a few fundamental array concepts lead to a simple and powerful programming paradigm for organizing, exploring and analysing scientific data is reviewed.
Diffuse radio sources in a statistically complete sample of high-redshift galaxy clusters
• Physics
Astronomy & Astrophysics
• 2020
Aims. Non-thermal properties of galaxy clusters have been studied using detailed and deep radio images in comparison with X-ray data. While much progress has been made in this area, most of the
Radio halos in a mass-selected sample of 75 galaxy clusters
• Physics
• 2021
Context. Many galaxy clusters host megaparsec-scale diffuse radio sources called radio halos. Their origin is tightly connected to the processes that lead to the formation of clusters themselves. In
The SPTpol Extended Cluster Survey
• Physics
The Astrophysical Journal Supplement Series
• 2020
We describe the observations and resultant galaxy cluster catalog from the 2770 deg$^2$ SPTpol Extended Cluster Survey (SPT-ECS). Clusters are identified via the Sunyaev-Zel'dovich (SZ) effect, and